REGEXP_FILE
  RegExpPatternImpl: <a[b&&-]>
    RegExpBranchImpl: <a[b&&-]>
      RegExpCharImpl: <a>
        PsiElement(CHARACTER)('a')
      RegExpClassImpl: <[b&&-]>
        PsiElement(CLASS_BEGIN)('[')
        RegExpIntersectionImpl: <b&&->
          RegExpCharImpl: <b>
            PsiElement(CHARACTER)('b')
          PsiElement(ANDAND)('&&')
          RegExpCharImpl: <->
            PsiElement(CHARACTER)('-')
        PsiElement(CLASS_END)(']')